.red {
    color: red;
    background-color: red;
    transition: color 2s ease;
    transition: background-color 2s ease;
}
.blue {
    color: blue;
    background-color: blue;
    transition: color 2s ease;
    transition: background-color 2s ease;
}
.yellow {
    color: yellow;
    background-color: yellow;
    transition: color 2s ease;
    transition: background-color 2s ease;
}
.black {
    background-color: black;
    transition: background-color 2s ease;
}
.bold {
    font-weight: bold;
}
.italic {
    font-style: italic;
}
#idFour {
    text-align: center;
    font-size: 40px;
    color: white;
}